Hollow building-block.



J. E. RETTIG.

HOLLOW BUILDING BLOCK.

APPLICATION FILED APR. 7, 1908.

Patented 0bt.20,190&

NITED STATES PATENT OFFICE,

JULIUS E. RETTIG, or READING, PENNSYLVANIA.

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Specification of Letters Patent.

" PialtentedOct. 20, 1908.

" 'Applieation filed-April 7, 1908. Serial No. 426,728. I i

To all 'iuhom it may concern:

Be'i known that I, Jones E. Rn'r'rre, a

' citizen of the United States, residing atReadin the county of Berks and State of, Penn- 'sy Vania, have invented certain new and useful Improvements inHollow Building-Blocks and I dohereby declare the following to be a full, clear, and exact descri tion of the invention,,such as will enable ot ers skilled in the art tolwhich it appertains to make and use the same; v

.My invention relates to'an improvement in hollow'building blocks, and the object of my invention is to rovide a simple, chea and' light building bl good non-conductor of moisture, heat and sound. y

- 7 With this object in view, my invention conock, and one that w' be a sists in the construction and combinationsof parts as hereinafter described and claimed.

Inthe accompanying drawing-B igure 1 isa perspective viewof one of my improved blocks, one of the covering plates being removed. Fig. 2 is a cross section of a part of a wall made of my improved blocks; Fig. 3 is a cross section of a modified form, and Fig. 4 is a bottom view of said modification.

' My im roved building block is made of sides a, ends 0, d; a bottom 0, and has either one, or'more, or no interior partitionf. The sides a and l) lproject slightly over the remaining faces of t e block thus forming acon-,

tinuous channel around the block. The'sides, 4 ends and bottom of the block form one, or in conjunction with one or more interior parti tions two or more spaces or cavities g, which preferably taper fromabove downwardly.- llates h are used to close the spaces 9; said.

plates fitting either into recesses provided on 'the upper ends of the sides, ends and partitions; or they may sim ly lay on the upper face of the block if such plates are made of sheet metal.

I Thesc blocks are made-of concrete or any desn'ed material, which will harden after being molded. The plates 72' are made preferably of the same materlal or of sheetmetal.

in building a wall a number of these blocks are placed in position to form a horizontal course of the wall; their ends-touching each other. The joints on the laces of thewall are then pointed; grouting 'i is afterwards poured into the vertical channels and as these communicate with the horizontal channels,

the blocks of one course, which break joint f h nh the blocks of each adjacent'horizontal course, are all thoroughly cemented together.

The plates h-of course are cemented to the blocks previous to grouting, as their object is ,to prevent-the Bgfout from enterin into the spaces g. A w built of such bloc light in weight, will be strong on account of the superiority of itsfjoints, it can be vbuilt cheaply, and it is a goo'd'non conductor of moisture, heat and sound. Furthermora'it is fire proof andcan'be easily plastered on both faces. It can alsobe used for theco nstruction of floors'and ceilings.

"InFi s. 3 and 4 a mo e form is shown, in whic openings 7" are providedcommuni- .catilnig with the spaces g. is o y useful when blocks of large sizeare used. Insuchcases the channel from iend'to end of a block is so long'that there is danger This modification that the grout. will "not 'flow. completel 75 through the .whole 1e th of the channe To prevent this the ho es 7" are made, and' when a wall is being laid of these'blocks the J cavities and with sides proiecting beyond the other dpialrts of'the block, caving a channel exten g completely around said block, and plates adapted to be cemented "intorecessed seats in the block, so as to close the cavities and leave said channel uninterrupted;

2. A g'routed together and laid so as .to break oints, each block being provided with cavities, with a mortarc annel extending entirely around said block and plates adapted to be cemented to said block, and'to close one end of said cavities without interrupting the mortar channel, substantially as described. i

Intestimony whereof, I affix my signature, in presence of two witnesses.

JULIUS n sn'rrre.

Witnesses:

M. KATHRYN Bnossmn,

1 ALBERT B. KAUFMANN.

Wall composed of hollowi blocks 

